添加更多uploadFile字段问题

Question

我想将小图像添加到CMS中的滑块。目前，对我来说我到这里是什么在起作用，我有一个很大的图片：

class Banner extends SortableObject { 

    private static $db = array(
    ); 

    private static $has_one = array(
     'HomePage' => 'HomePage', 
     'Image' => 'Image', 
     'Target' => 'Page', 
    ); 

    private static $summary_fields = array(
     'ID', 
     'Target.MenuTitle', 
    ); 

    public function getCMSFields() { 
     $fields = new FieldList(); 

     $img = new UploadField('Image'); 
     $img->setFolderName('hpbanners'); 
     $img->getValidator()->setAllowedExtensions(array('jpg','gif','png')); 
     $fields->push($img); 

     $drop = new TreeDropdownField('TargetID','Choose page','SiteTree'); 
     $fields->push($drop); 

     return $fields; 
    } 
} 

现在我想添加一个字段。我加$smallImage，据我所知这应该之前在数据库中添加新列，就像图片，但我的问题是，在数据库表我只有第一形象，二是不添加：

class Banner extends SortableObject { 

    private static $db = array(
    ); 

    private static $has_one = array(
     'HomePage' => 'HomePage', 
     'Image' => 'Image', 
     'SmallImage' => 'SmallImage', 
     'Target' => 'Page', 
    ); 

    private static $summary_fields = array(
     'ID', 
     'Target.MenuTitle', 
    ); 

    public function getCMSFields() { 
     $fields = new FieldList(); 

     $img = new UploadField('Image'); 

     $img->setFolderName('hpbanners'); 
     $img->getValidator()->setAllowedExtensions(array('jpg','gif','png')); 
     $fields->push($img); 

     $smallImage = new UploadField('SmallImage'); 
     $smallImage->getValidator()->setAllowedExtensions(array('jpg','gif','png')); 
     $fields->push($smallImage); 

     $drop = new TreeDropdownField('TargetID','Choose page','SiteTree'); 
     $fields->push($drop); 

     return $fields; 
    } 
} 

所以，请告诉我，因为我知道这个列会自动添加，应该清除缓存还是我做错了什么？帮我！ :)

Answer 1

关系总是形式为'YourRelationName' => 'Type'。所以你的$has_one关系的定义应该是：

private static $has_one = array(
    'HomePage' => 'HomePage', 
    'Image' => 'Image', 
    'SmallImage' => 'Image', // Use type 'Image', not 'SmallImage' 
    'Target' => 'Page', 
);